#403D56

#403D56

Color Values

HEX

#403D56

RGB

64, 61, 86

HSL

247.2, 17.0%, 28.8%

HSV

247.2, 29.1%, 33.7%

CMYK

25.6%, 29.1%, 0.0%, 66.3%

OKLCH

0.3737 0.0425 289.7

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#403D56

#53563D

Analogous

#3D4656

#4C3D56

#403D56

Triadic

#403D56

#56403D

#3D5640

Split Complementary

#403D56

#564C3D

#46563D

Tetradic

#403D56

#563D46

#53563D

#3D564C

Color Blindness Simulation

Original

#403D56

Protanopia

#3F3F50

Deuteranopia

#3F3F4E

Tritanopia

#404B4A

Achromatopsia

#3F3F3F

CSS Usage

background-color: #403D56;
color: #403D56;
border-color: #403D56;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F7F6F8
100
#EBEBF0
200
#D7D5E1
300
#BAB7CC
400
#9491B1
500
#6F6A95
600
#595577
700
#47445F
800
#38354B
900
#2B2938
950
#1B1A23

Contrast Checker

Text on white

10.4:1

AA Pass AAA Pass

Text on black

2.02:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026